Combined three-stage sedimentation tank and working method

Abstract

The invention discloses a combined three-stage sedimentation tank and a working method, and belongs to the technical field of construction wastewater treatment. The combined type three-stage sedimentation tank comprises a first column of tank bins and a second column of tank bins, water inlet holes are formed in the front ends of the two columns of tank bins, water outlet holes are formed in the tail ends of the two columns of tank bins, the first column of tank bins are composed of three chambers which are connected in series, and the second column of tank bins are single tank bins. Drainage holes are formed between the three chambers of the first column of tank bins and the single tank bin, drainage holes are also formed among the three chambers, and all the water inlet holes, the water outlet holes and the drainage holes are provided with water stop valves. According to the combined type three-stage sedimentation tank, through the multi-bin conversion design, online alternate operation can be achieved, uninterrupted continuous operation of the whole sedimentation system is guaranteed, whole-line discharging stopping is avoided, the remarkable energy-saving effect is achieved, and the requirement for green construction is met.

Description

Technical Field

[0001] This invention relates to a combined three-stage sedimentation tank and its working method, belonging to the field of construction wastewater treatment technology. Background Technology

[0002] Three-stage sedimentation tanks, widely used in construction sites for treating construction wastewater, typically employ brick-concrete or reinforced concrete structures, dividing the tank into three interconnected chambers. Wastewater passes through each chamber sequentially, primarily utilizing gravity settling to remove suspended solids. However, this design has significant limitations in addressing single-chamber sludge removal and tank repair issues.

[0003] 1. Because each sedimentation chamber has a fixed function and is strictly connected in series, cleaning or repairing any chamber requires shutting down the entire sedimentation system, severely affecting the continuity of drainage and resulting in low efficiency. Using high-efficiency equipment such as ultrasonic filters would increase construction costs.

[0004] 2. The dredging operation is in a harsh environment: it usually requires manual dredging, which is not only labor-intensive and inefficient, but also poses safety hazards.

[0005] 3. Poor flexibility and weak emergency response capabilities: The fixed pool structure and water flow path prevent process switching and lack flexibility in responding to sudden failures or maintenance needs. All sewage must be emptied before pool dredging, resulting in significant pump energy consumption. Summary of the Invention

[0006] The present invention aims to provide a combined three-stage sedimentation tank, which can solve the problems of sludge removal and tank repair of single-tank sedimentation tanks without affecting the normal use of the sedimentation tank through a multi-tank conversion and combination structure.

[0007] To achieve the above-mentioned technical objectives, the technical solution adopted by the present invention is as follows:

[0008] A combined three-stage sedimentation tank includes a first column of tanks and a second column of tanks. Both columns of tanks have inlet ports at their front ends and outlet ports at their rear ends. The first column of tanks consists of a first chamber, a second chamber, and a third chamber connected in series. The second column of tanks is a single tank. Each of the three chambers in the first column of tanks is connected to a single tank with a drainage port, and the three chambers in the first column of tanks are also connected with each other with a drainage port. All inlet ports, outlet ports, and drainage ports are equipped with stop valves.

[0009] Furthermore, the inlet of the first row of pools is the first inlet, the inlet of the second row of pools is the fifth inlet, the outlet of the first row of pools is the fourth outlet, and the outlet of the second row of pools is the tenth outlet.

[0010] A second drainage outlet is located between the first and second compartments; a sixth drainage outlet is located between the first compartment and the single-pool compartment; a third drainage outlet is located between the second and third compartments; a seventh and an eighth drainage outlet are located between the second compartment and the single-pool compartment; and a ninth drainage outlet is located between the third compartment and the single-pool compartment.

[0011] The elevation relationships of the above-mentioned inlets are as follows: First inlet inlet = Fifth inlet inlet > Second outlet inlet = Sixth outlet inlet = Seventh outlet inlet > Third outlet inlet = Eighth outlet inlet = Ninth outlet inlet > Fourth outlet inlet = Tenth outlet inlet.

[0012] The present invention also provides a method for operating the above-mentioned combined three-stage sedimentation tank, including five operating modes: daily operating mode, first chamber shutdown operating mode, second chamber shutdown operating mode, third chamber shutdown operating mode, and single chamber shutdown operating mode.

[0013] Furthermore, in the normal working mode, the first water inlet, the second drainage outlet, the third drainage outlet, the fourth water outlet, the fifth water inlet, and the seventh drainage outlet are opened, while the remaining outlets are closed. The wastewater flows sequentially through the first chamber, the single pool chamber, the second chamber, and the third chamber, achieving three-stage sedimentation before being discharged.

[0014] Furthermore, when the first chamber is in the off-duty working mode, the third drainage outlet, the fourth outlet, the fifth inlet, and the seventh drainage outlet are opened, while the remaining outlets are closed. Wastewater flows sequentially through the single pool, the second chamber, and the third chamber, achieving three-stage sedimentation before being discharged.

[0015] Furthermore, when the second chamber is in the off-duty working mode, the first inlet, the fourth outlet, the sixth drain, and the ninth drain are opened, while the remaining outlets are closed. Wastewater flows sequentially through the first chamber, the single-tank chamber, and the third chamber, achieving three-stage sedimentation before being discharged.

[0016] Furthermore, when the third chamber is in the off-duty working mode, the first inlet, the second outlet, the eighth outlet, and the tenth outlet are opened, while the remaining outlets are closed. Wastewater flows sequentially through the first chamber, the second chamber, and the single-tank chamber, achieving three-stage sedimentation before being discharged.

[0017] Furthermore, when in single-tank shutdown mode, the first inlet, second outlet, third outlet, and fourth outlet are opened, while the remaining outlets are closed. Wastewater flows sequentially through the three chambers of the first row of tanks, achieving three-stage sedimentation before being discharged.

[0018] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0019] 1. The combined three-stage sedimentation tank of this invention, through its multi-compartment switching design, enables "online alternating operation," ensuring uninterrupted continuous operation of the entire sedimentation system. By avoiding complete shutdowns, it achieves significant energy-saving effects in overall operation, meeting the requirements of green construction.

[0020] 2. Compared to traditional methods where all sewage must be drained before dredging, resulting in significant pump energy consumption, this invention's modular design allows for the isolation and independent emptying of individual compartments. Its smaller volume directly leads to a substantial reduction in power consumption.

[0021] 3. The working method of the present invention enables dredging, repair and other processes to be carried out in a dry, isolated and safe environment, reducing the risk and difficulty of the operation at the same time, and improving both maintenance quality and efficiency, thus realizing the refinement and standardization of construction management. Attached Figure Description

[0022] Figure 1 This is a plan view of a preferred embodiment of the combined three-stage sedimentation tank of the present invention.

[0023] Figure 2 This is a schematic diagram of the working method of the present invention in its normal working mode.

[0024] Figure 3 This is a schematic diagram of the working method of the present invention when the first compartment is in the off-duty working mode.

[0025] Figure 4 This is a schematic diagram of the working method of the present invention when the second compartment is in the off-duty working mode.

[0026] Figure 5 This is a schematic diagram of the working method of the present invention when the third compartment is in the off-duty working mode.

[0027] Figure 6 This is a schematic diagram of the working method of the present invention in the single-pool deactivation mode. Detailed Implementation

[0028] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The objectives, technical solutions, and advantages of the present invention will become clearer from the following description. It should be noted that the described embodiments are preferred embodiments of the present invention, but not all embodiments.

[0029] Combination Figure 1As shown, a combined three-stage sedimentation tank includes a first row of tank compartments and a second row of tank compartments. Both rows of tank compartments have inlet ports at their front ends and outlet ports at their rear ends. The first row of tank compartments consists of a first compartment A, a second compartment B, and a third compartment C connected in series. The second row of tank compartments is a single tank compartment D. Drainage ports are provided between each of the three compartments in the first row of tank compartments and the single tank compartment D, and drainage ports are also provided between the three compartments in the first row of tank compartments. All inlet ports, outlet ports, and drainage ports are equipped with stop valves. The inlet port of the first row of tank compartments is the first inlet port 1, the inlet port of the second row of tank compartments is the fifth inlet port 5, the outlet port of the first row of tank compartments is the fourth outlet port 4, and the outlet port of the second row of tank compartments is the tenth outlet port 10. The first compartment A and the second compartment B are connected by a second drainage outlet 2. The first compartment A and the single pool compartment D are connected by a sixth drainage outlet 6. The second compartment B and the third compartment C are connected by a third drainage outlet 3. The second compartment B and the single pool compartment D are connected by a seventh drainage outlet 7 and an eighth drainage outlet 8. The third compartment C and the single pool compartment D are connected by a ninth drainage outlet 9.

[0030] The elevation relationships of the above-mentioned openings are as follows: First water inlet opening = Fifth water inlet opening > Second drainage opening = Sixth drainage opening = Seventh drainage opening > Third drainage opening = Eighth drainage opening = Ninth drainage opening > Fourth water outlet opening = Tenth water outlet opening.

[0031] The present invention relates to a combined three-stage sedimentation tank operating method, which includes five operating modes: daily operating mode, first chamber shutdown operating mode, second chamber shutdown operating mode, third chamber shutdown operating mode, and single tank D shutdown operating mode.

[0032] Combination Figure 2 As shown, in the normal working mode, the first water inlet 1, the second drainage outlet 2, the third drainage outlet 3, the fourth water outlet 4, the fifth water inlet 5, and the seventh drainage outlet 7 are opened, and the remaining outlets are closed. The wastewater flows through the first chamber A, the single pool chamber D, the second chamber B, and the third chamber C in sequence, and is discharged from the fourth water outlet 4 after three-stage sedimentation.

[0033] Combination Figure 3 As shown, when the first chamber A is in the off-duty working mode, the third drainage outlet 3, the fourth outlet 4, the fifth inlet 5, and the seventh drainage outlet 7 are opened, while the remaining outlets are closed. The wastewater flows sequentially through the single pool chamber D, the second chamber B, and the third chamber C, and is discharged from the fourth outlet 4 after three-stage sedimentation.

[0034] Combination Figure 4As shown, when the second chamber B is in the off-duty working mode, the first water inlet 1, the fourth water outlet 4, the sixth drainage outlet 6 and the ninth drainage outlet 9 are opened, and the remaining outlets are closed. The wastewater flows through the first chamber A, the single pool chamber D and the third chamber C in sequence, and is discharged from the fourth water outlet 4 after three-stage sedimentation.

[0035] Combination Figure 5 As shown, when the third chamber C is in the off-duty working mode, the first water inlet 1, the second drainage outlet 2, the eighth drainage outlet 8 and the tenth water outlet 10 are opened, and the remaining outlets are closed. The wastewater flows through the first chamber A, the second chamber B and the single pool chamber D in sequence, and is discharged from the tenth water outlet 10 after three-stage sedimentation.

[0036] Combination Figure 6 As shown, when the single tank D is in the off-duty working mode, the first inlet 1, the second outlet 2, the third outlet 3 and the fourth outlet 4 are opened, and the remaining outlets are closed. The wastewater flows through the three chambers of the first tank in sequence, and after three-stage sedimentation, it is discharged from the fourth outlet 4.

[0037] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Obviously, any person skilled in the art can easily conceive of substitutions or variations based on the above embodiments to obtain other embodiments, and these should all be covered within the scope of protection of the present invention.

Claims

1. A combined three-stage sedimentation tank characterized in that: it comprises a first column of tank compartments and a second column of tank compartments, both columns are provided with water inlet openings at the front ends and water outlet openings at the tail ends, the first column of tank compartments is composed of a first chamber, a second chamber and a third chamber connected in series, the second column of tank compartments is a single tank compartment, and the three chambers of the first column of tank compartments are provided with drainage openings between each other and between each chamber and the single tank compartment, all the water inlet openings, water outlet openings and drainage openings are provided with water stop valves.

2. The combined three-stage sedimentation tank according to claim 1, characterized in that: the water inlet opening of the first column of tank compartments is a first water inlet opening, the water inlet opening of the second column of tank compartments is a fifth water inlet opening, the water outlet opening of the first column of tank compartments is a fourth water outlet opening, and the water outlet opening of the second column of tank compartments is a tenth water outlet opening, the second drainage opening is between the first chamber and the second chamber, the sixth drainage opening is between the first chamber and the single tank compartment, the third drainage opening is between the second chamber and the third chamber, the seventh and eighth drainage openings are between the second chamber and the single tank compartment, and the ninth drainage opening is between the third chamber and the single tank compartment, the elevation relationship of the above openings is: first water inlet opening = fifth water inlet opening > second drainage opening = sixth drainage opening = seventh drainage opening > third drainage opening = eighth drainage opening = ninth drainage opening > fourth water outlet opening = tenth water outlet opening.

3. The working method of the combined three-stage sedimentation tank according to claim 1 or 2, characterized in that: it comprises five working modes: daily working mode, first chamber shutdown working mode, second chamber shutdown working mode, third chamber shutdown working mode and single tank compartment shutdown working mode.

4. The working method according to claim 3, characterized in that: when in the daily working mode, the first water inlet opening, the second drainage opening, the third drainage opening, the fourth water outlet opening, the fifth water inlet opening and the seventh drainage opening are opened, and the remaining openings are closed, the wastewater flows through the first chamber, the single tank compartment, the second chamber and the third chamber in sequence, and is discharged after three-stage sedimentation.

5. The working method according to claim 3, characterized in that: when in the first chamber shutdown working mode, the third drainage opening, the fourth water outlet opening, the fifth water inlet opening and the seventh drainage opening are opened, and the remaining openings are closed, the wastewater flows through the single tank compartment, the second chamber and the third chamber in sequence, and is discharged after three-stage sedimentation.

6. The working method according to claim 3, characterized in that: when in the second chamber shutdown working mode, the first water inlet opening, the fourth water outlet opening, the sixth drainage opening and the ninth drainage opening are opened, and the remaining openings are closed, the wastewater flows through the first chamber, the single tank compartment and the third chamber in sequence, and is discharged after three-stage sedimentation.

7. The working method according to claim 3, characterized in that: ​ ​ ​ ​ ​ ​ ​ ​ ​ When in the third chamber deactivation mode, the first water inlet, the second water outlet, the eighth water outlet and the tenth water outlet are opened, and the rest are closed. The wastewater flows through the first chamber, the second chamber and the single-pool chamber in sequence, and is discharged after three-stage sedimentation.

8. The working method of claim 3, wherein: When in the single-pool chamber deactivation mode, the first water inlet, the second water outlet, the third water outlet and the fourth water outlet are opened, and the rest are closed. The wastewater flows through the three chambers of the first column of pool chambers in sequence, and is discharged after three-stage sedimentation.

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